Concurrent maintenance on EMC CLARiiON systems
Concurrent maintenance is the ability to process I/O operations to a controller while simultaneously doing maintenance on it.
Important: An EMC field engineer must complete
all maintenance procedures.
The EMC CLARiiON FC series and the Storwize® V3500 clustered system allow concurrent replacement of the following components:
- Disk drives
- Controller fans (fans must be replaced within 2 minutes or controllers are shut down)
- Disk enclosure fans (fans must be replaced within 2 minutes or controllers are shut down)
- Controller (you must first disable service processor cache)
- Fibre Channel Bypass cards (LCC)
- Power supplies (you must first remove fans)
- Uninterruptible power supply battery (SPS)
EMC CLARiiON FC devices require that the I/O is quiesced during code update. Therefore, the Storwize V3500 system does not support concurrent update of the FC controller code.
The EMC CLARiiON CX series and the Storwize V3500 system allow concurrent replacement of the following components:
- Disk drives
- Controller (service processor or drawer controller)
- Power/cooling modules (modules must be replaced within 2 minutes or controllers are shut down)
- Uninterruptible power supply battery (SPS)
The Storwize V3500 system and EMC CLARiiON CX devices support concurrent code update of the CX controllers.
Note:
- EMC CLARiiON procedures for concurrent update must be followed in all cases.
- The CX Series also has a feature that is called Data In Place Update. Use this feature to update from one model to another (for example, from the CX200 to the CX600) with no data loss or migration required. This operation is not a concurrent operation.